A central character from the ACOTAR book series, Cassian (pronounced: Cas-e-an) is an Illyrian member of the Night Court and part of Rhysand's Inner Circle. He is a childhood friend of Rhysand and Azriel. He rose to become the General Commander of Rhysand's - the Night Court's - armies. He is considered to be one of the most powerful Illyrians in Prythian history, along with Rhysand and Azriel.